It was dumb of me to ask if you had a rig lol, cuz if you did, you'd just use that. The sheldon black bubbler is probably the worst possible design for using a hakko and oil, sadly (the mouth peice is at the top). Because it will vaporize FAST, and it will rise straight up, and you'd probably lose so much precious THC.
This might sound kind of weird. But honestly, how I'd go about it. Is i would stand up my heated hakko (like in a glass or something). Turn your bubbler UPSIDE DOWN (yes this is what makes it crazy haha) Stick the hakko slightly into the mouth of the downstem. Then simply put the dab to the hakko and babam, all the smoke would rise into your bubbler, and you'd already be inhaling the hit. You'd have absolutely no loss. It will work very well, you'll notice, it will vaporize very fast. It's not on the level of like a heated titanium nail, but its close enough.
You can simply make your own rig too though, like any large mouthed house would work (ya know in combination with standing up your heated hakko), I used to use a jar and poke 2 holes in the lid, one hole would be for my hakko to go inside of and touch the dab that was in the jar (well hot knives was what i used when i had my jar thing) and the other hole I'd hook a hose to. Would get really great hits out of that
